Effects of two adjuvants on bactericide reduction and efficacy enhancing in chemical prevention and control of walnut cancer disease
[Objective]To clarify the occurrence rule of walnut cancer disease and reduce the concentra-tion of chemical pesticides in the prevention and control process.[Methods]A survey of walnut cancer dis-ease was carried out in 6 sample plots in Buzhake Township,Hetan County,Hetan,prefecture Xinjiang from A-pril to August 2022 through five-point sampling method.Two chemical agents optimized in the early stage:40%Tebuconazole&Prochloraz EW and 1.6%benziothiazolinone PF,and two adjuvants:noposion Toucui bark penetrant and SK EnSpray 99 were applied in 10 different treatments.After application,the recurrence and healing of the spots were observed,and the efficacy prevention,the correction anti-effect and the mean healing width were calculated.[Results]The results showed that there were two peak periods of walnut cancer disease in Buzhake Township,Hotan County,Xinjiang in May and August in 2022.The pathogen invaded main-ly through the sawing edge,accounting for 44.1%of the total number of spots.The number of spots on the sun-ny side was the most.The control effect of 40%Tebuconazole&Prochloraz EW reduced by 30%(1,428 times of solution)+ Toucui 100 times of solution and 1.6%benziothiazolinone PF reduced by 50%(400 times of solution)+ Toucui 100 times of solution were better,80%and 86.7%,respectively.[Conclusion]The opti-mal combination of the two groups of agents is beneficial to reduce the dosage of chemical agents,decrease the cost of prevention and control,and reduce the pollution to the environment.
walnut cancer diseaseregularity of onsetchemical pesticidesadjuvantsbactericide reduc-tion and efficacy enhancing
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